Some programmers like to use the this variable to refer to instance variables, or to method calls on the implicit parameter object. Rearrange the code of the Name class that makes use of the this variable. First list the instance variables. The tostring method yields a string such as "Smith, John" or$,$ if no last name is given, "Fred".

How to use this tool

Unused

this. last $=$ null;

private String last;

else return this. last $+$ separator; $\}$

return this.getLast $(,w_1)+$ this. first;

this. last $=$ last;

if $($this$.$ last $==$ null$)\{$ return $""\text{'}$; $\}$

this. first $=$ first;

private String first;

this. first $=$ first;

Name.java

Load default template...

import java.util. Scanner;

public class Name $\{$

public Name$($String first$)$

$\{$

$\}$

public Name$($String first, String last$)$

$\{$

$\}$

private String getLast$($String separator$)$

$\{$

$\}$

public String toString$()$

$\{$

$\}$